Photo: Piyush Kothari / Wikimedia Commons, CC BY-SA 4.0
Ashwagandha
Withania somnifera
Also known as: Asgand
Part used: Root
Ashwagandha (Withania somnifera) is an Indian shrub whose root is Ayurveda's best-known adaptogen. Classified as a Rasayana and Balya drug, it is used for stress, anxiety, poor sleep, low stamina and muscle weakness. The name means "smell of a horse" — for the root's odour and the strength it is said to confer.
| Rasa (taste) | Tikta, Kashaya, Madhura |
|---|---|
| Guna (qualities) | Laghu, Snigdha |
| Virya (potency) | Ushna |
| Vipaka | Madhura |
| Dosha | Balances Vata & Kapha |
| Prabhava | Balya, Rasayana, Medhya |
Key takeaways
- Botanical name: Withania somnifera
- Part used: Root
- Dosha action: Balances Vata & Kapha
- Typical dose: Root powder (churna): 3–6 g per day, usually with warm milk, ghee or honey, once or twice daily.
Ashwagandha in other languages
Introduction
Ashwagandha (Withania somnifera) is among the most revered rejuvenatives in Ayurveda, classed as a Balya (strength-giving) and Rasayana (rejuvenating) herb. Its Sanskrit name means "smell of a horse," alluding both to the odour of the fresh root and to the strength and vigour it is said to confer. The root is the primary part used.
Classification
Botanically Ashwagandha belongs to the Solanaceae (nightshade) family. In Ayurvedic dravya-guna it is grouped among the Balya and Rasayana dravyas and appears in the Bhavaprakash Nighantu Guduchyadi Varga. Its Ushna virya (heating potency) and Madhura vipaka make it nourishing yet Vata- and Kapha-pacifying.
Uses & benefits
Traditionally, Ashwagandha is used to build physical strength and stamina, calm the mind, relieve stress and anxiety, promote sound sleep, and support healthy muscle and reproductive tissue. As a Medhya (mind-supporting) Rasayana it is valued in convalescence, overwork, and age-related debility. Modern interest centres on its adaptogenic role in stress and cortisol balance.
Ashwagandha for stress and anxiety
Its most researched use. As an adaptogen it moderates the body's stress response rather than sedating, which is why it suits daytime use where a sedative would not.
Ashwagandha for sleep
The species name somnifera means sleep-bearing. It is used for difficulty falling asleep driven by a restless mind, typically taken with warm milk at night.
Ashwagandha for strength and stamina
A Balya drug — strength-giving. Used in convalescence, underweight and physical depletion, and traditionally taken with milk and ghee to build tissue.
Ashwagandha for muscle and joint pain
Used across Vata disorders where pain comes with stiffness and weakness. It is a component of Ashwagandharishta and Maha Narayan Tel.
Ashwagandha for thyroid support
Traditionally used in low thyroid states with fatigue and cold intolerance. Anyone on thyroid medication must tell their physician, as effects can compound.
Ashwagandha as a Vajikarana drug
Classically listed among the Vrishya herbs used for male reproductive vitality and low libido — a well-attested traditional indication.
Ashwagandha for immunity
Its Rasayana classification covers resistance to illness generally. Taken over weeks rather than at the first sign of infection.
Ashwagandha for memory and focus
Used as a Medhya drug where poor concentration follows exhaustion or stress, rather than as a stimulant.
Ashwagandha for recovery after illness
One of the clearest classical indications: the thin, depleted, sleepless patient rebuilding after a long illness.
Ashwagandha in classical formulations
The lead drug of Ashwagandharishta and Ashwagandhadi Churna, and present in a large share of the tonic and Vata preparations.
Dosage — how much to take
Root powder (churna): 3–6 g per day, usually with warm milk, ghee or honey, once or twice daily. Standardised extracts are taken in smaller doses. Best taken at night for sleep, or after meals for strength. Always follow the dose advised by your Vaidya.
Dosage varies with age, constitution and condition — confirm with a qualified Vaidya.
Traditional uses — questions answered from the classical texts
Answers are drawn from the citations and properties recorded for this drug. No chapter-and-verse reference appears that the record does not carry.
Which classical texts describe Ashwagandha?
The citations held for Ashwagandha in this catalogue are: Charaka Samhita (Balya & Rasayana dravya); Bhavaprakasha Nighantu (Guduchyadi Varga).
What does the Charaka Samhita record about Ashwagandha?
Cited among strength-promoting and rejuvenating herbs. Reference: Charaka Samhita — Balya & Rasayana dravya.
What does the Bhavaprakasha Nighantu record about Ashwagandha?
Described with Balya and Rasayana properties. Reference: Bhavaprakasha Nighantu — Guduchyadi Varga.
What is Ashwagandha traditionally used for in Ayurveda?
Traditionally, Ashwagandha is used to build physical strength and stamina, calm the mind, relieve stress and anxiety, promote sound sleep, and support healthy muscle and reproductive tissue. As a Medhya (mind-supporting) Rasayana it is valued in convalescence, overwork, and age-related debility. Modern interest centres on its adaptogenic role in stress and cortisol balance.
What are the Ayurvedic properties of Ashwagandha?
Rasa Tikta, Kashaya, Madhura, Guna Laghu, Snigdha, Virya Ushna, Vipaka Madhura. Dosha action: Balances Vata & Kapha. Prabhava: Balya, Rasayana, Medhya.
Why is Ashwagandha classified the way it is?
In dravya-guna a drug's dosha action follows from its taste, qualities, potency and post-digestive effect. Ashwagandha carries Ushna virya and Madhura vipaka, which together give the recorded action: Balances Vata & Kapha.
Which part of Ashwagandha is used medicinally?
The part used is Root.
How much Ashwagandha is taken, and how?
Root powder (churna): 3–6 g per day, usually with warm milk, ghee or honey, once or twice daily. Standardised extracts are taken in smaller doses. Best taken at night for sleep, or after meals for strength. Always follow the dose advised by your Vaidya. Dosage varies with age, constitution and condition — confirm it with a qualified Vaidya.
When should Ashwagandha be avoided?
Generally well tolerated in classical doses. Best avoided in the acute stage of high Pitta or fever without guidance, and used cautiously in pregnancy. Consult a qualified physician before use, particularly alongside sedative or thyroid medication.
Where does Ashwagandha grow?
Ashwagandha is a short woody shrub native to the drier regions of India, the Middle East and North Africa. In India it is cultivated widely across Madhya Pradesh, Rajasthan, Gujarat and Maharashtra, thriving in dry, sandy, well-drained soils under a warm climate.
Classical references
- Charaka Samhita — Balya & Rasayana dravya
Cited among strength-promoting and rejuvenating herbs. - Bhavaprakash Nighantu — Guduchyadi Varga
Described with Balya and Rasayana properties.
Modern research
-
Effects of Ashwagandha (Withania somnifera) on stress and anxiety: A systematic review and meta-analysis
Systematic review authors (see source). (systematic review / meta-analysis) (2024)
A systematic review and meta-analysis of randomized controlled trials reporting a significant effect of ashwagandha supplementation on perceived-stress measures in adults.
View study doi:10.1016/j.explore.2024.103062 -
Adaptogenic and Anxiolytic Effects of Ashwagandha Root Extract in Healthy Adults: A Double-blind, Randomized, Placebo-controlled Clinical Study
Salve J, Pate S, Debnath K, Langade D. Cureus (2019)
A 60-day RCT in 60 stressed adults reported that 240 mg/day standardized ashwagandha extract was associated with greater reductions in morning cortisol and anxiety scores than placebo.
View study doi:10.7759/cureus.6466 -
A prospective, randomized double-blind, placebo-controlled study of safety and efficacy of a high-concentration full-spectrum extract of ashwagandha root in reducing stress and anxiety in adults
Chandrasekhar K, Kapoor J, Anishetty S. Indian Journal of Psychological Medicine (2012)
A 60-day RCT (n=64) found high-concentration ashwagandha root extract significantly reduced stress-scale scores and serum cortisol versus placebo, with a good safety profile.
View study doi:10.4103/0253-7176.106022
Safety & precautions
Generally well tolerated in classical doses. Best avoided in the acute stage of high Pitta or fever without guidance, and used cautiously in pregnancy. Consult a qualified physician before use, particularly alongside sedative or thyroid medication.
Where it grows
Ashwagandha is a short woody shrub native to the drier regions of India, the Middle East and North Africa. In India it is cultivated widely across Madhya Pradesh, Rajasthan, Gujarat and Maharashtra, thriving in dry, sandy, well-drained soils under a warm climate.
Frequently asked questions
What does Ashwagandha do?
Ashwagandha is an adaptogen: it moderates how the body responds to stress. In Ayurveda it is used for anxiety, poor sleep, low stamina, muscle weakness and recovery after illness, and it is classified both as a Rasayana (rejuvenative) and a Balya (strength-giving) drug.
How much Ashwagandha should I take per day?
Root powder 3–6 g per day, usually with warm milk. It is taken over six to twelve weeks rather than briefly, because the adaptogenic effect builds. Standardised extracts are dosed far lower — follow the product label rather than the crude-powder figure.
When is the best time to take Ashwagandha?
At night with warm milk if you are taking it for sleep or recovery, which is the classical timing. In the morning if you are taking it for daytime stress and stamina. Consistency matters more than timing.
Who should not take Ashwagandha?
Avoid in pregnancy. Take medical advice first if you have hyperthyroidism, an autoimmune condition, or take thyroid, sedative or immunosuppressant medication. It is in the nightshade family, so anyone with a known nightshade sensitivity should be cautious.
Does Ashwagandha cause weight gain?
It is traditionally used to help underweight people build tissue, so weight gain is a recognised effect of the classical milk-and-ghee preparation rather than of the herb alone. Taken as a plain powder or extract, it is not usually associated with weight gain.
How long before Ashwagandha starts working?
Two to four weeks for sleep and stress, longer for strength and stamina. It is not an acute remedy — if you feel nothing after a single dose, that is expected.
Is Ashwagandha safe long term?
It has a long history of extended use as a Rasayana. Even so, take periodic breaks rather than using it indefinitely, and stop and seek advice if you notice digestive upset or unusual drowsiness. Rare reports of liver injury exist, mostly with concentrated extracts.
